Perforating machine



Dec. 4, 1945. E. A. GUBISCH 2,390,435

PERFORATING MACHINE Filed March 1, 1944 3 Sheets-Sheet 1 FIG. I

INVENTOR ERW IN A. GUBISGH ATT NEY D 4, 1945- v E. A. GUB|SH 1 2,390,435

PERFORAT ING MACHINE Filed March 1, 1944 3 Sheets-Sheet 3 mum? '5HLUJJIIIIK llllllllllllllllllflfl% INVEN IOR I ERWIN A. GUBISCI'IATTORNEY Patented Dec. 4, 1945 Erwin; A. Gubis ch; Chicago, Ill;assignor: to Telet-= type Corporation, Chicagmjllh, a. corporation ofDelaware Application March" 1, 1944, Serial No; 524,605

9- Claims.

The present i'nvention pertains to perforating machihesandmoreparticularly to apparatus for preparing" perforated tape for telegraphsignaling.

In operating telegraph tape perforating equipment manually by keylevers, especially machines such as the'Wheatstone perforator,theresome.- times'occurs the'tendency of punch interponents; which havebeen selected as designatingsome code combination; moving downwardly dueto the operator removing a finger from the key- Board too quickly, withthe' result that when the punching mechanism; moves" to operate thepunches through the selected punch interponents the inte ponents: whichhave moved downwardly will not operate their respective punches andthereforea blank code combination will be perforated in the tape.

Accordingly, it? is the principal object of the present invention. toprevent. occurrence of the possible difficulty previously encounteredand for assuring proper and correct perforation of the strip for thedepres'sedkey lever.

"Iheapparatds for'the' attainment of-the. above andother obiectsof theinvention comprises in generalxspringurged pawls which move into aposition under legs on; the: punch" interponents when the i'nterponentsmove to their raised or selected" position, thus preventing' a downwardmovement of the interponents during the major portion of the punchhammer stroke. A pair of balls are provided which are actuated duringthe latter portion of the punch hammer stroke to cause" an outward"movement of the spring urgedpawls, thus releasing them from underthelogs of the punch; interponents to allow the punch interponents to;return to their normal downward position;

The presentinvention has been: disclosed as being. used in combinationwith. a standard Wheatstone perforator' such as that substantially'disclosed and: described in. U. S. Patent 085,985, issued to Edward E.Kleinschmidt on February 3,. I914", or in Bulletin No. 125, issued inAugust, 1937, by the Teletype Corporation of Chicagm Illinois. It shouldbe noted, however,

that'the present device. utilizes more links of a flexible naturethanthe' perforator referred to above; However, itisto be understoodthat the use of the: presentinvention is not limited to operation with aWheatstone. perforatoribut' may be usedwith any tape perforatingmechanism wherein a similar'problem occurs.

A more oompleteunderstandnig; of the inven:

tlon may be had from the following description taken in connection withthe accompanying drawings; in which."

Figi 1 is a plan view of a Wheatstone per forator embodying theinvention, with a section ofthe cover plate broken away;

Fig. 2 is a sectional view taken approximately onthe'line 2"2 orFig. 1:i

Fig; 3 is anenlarged view of the mechanism embodying-the invention,asishownin Fig. 22:

Fig; 4" discloses an operational view'of the apparatusembodying" theinvention showing its operated and released positions;

Fig; 5 is'a' plan view of the upper part of the apparatus as shown inFig. 1 with the top mech ani-snr removed, 7 i V Fig: 6 i's'anelevational view partl-ybroken-away showing the rear part of theWheatstone perforator; and" Fig. 7 isa perspective viewpartlybroken'a-way; showing a special device to insure'that the elec tri'calcontacts for operatingthe punchoperating solenoid will bekept cl'osedfora length of time sufiicicnt for proper; operation ofthe'perforator.

The Wheatstone perforator; which is fully disclosedin theabove-mentioned patent and brine-- tin; comprises a bank of" key" leversI l the-keys of which are provided with the characters of'a universalkeyhoardand which may be manually operated by an operatorpreparing aperforated tape. The key"levers H- are iulcrumed about a transverse barF2. Secured beneath each 0? the key' levers H and secured thereto bymeanso-fa connecting member P3 are a series of notched code bars M, onecorresponding to each of the key levers H; and having notches on"theirlower surface in accordance with the code combination for thatparticular symbol designated'by the key; The code bars M are allfulcrumed; on a transverse bar f6. The code bars 3 and their associatedkey levers I l areheld in a normal or unselected position by means ofsprings I 1; one

individual to each code bar. The upward movement of the forward end ofthe key levers H caused by the spring FF isl-im-ited by a transverseleather stop [8 which" is secured within the top frame at the frontofthe perforating apparatus, and overlies all of the key levers. A stop[9 is likewis providedto limit the downward movement of the code bars I4 andal'so-the key levers H when depressed" by an operator during: theoperation of the perforating equipment;

Upon the depression or any key its corresponding" key lever Handfnotched' code-*bar l4 move downwardly; the specificcontoun oi thelower edge of the code bar causing certain of the transvers T-levers 2|to be depressed. Each T-lever 2| has connected thereto a rearwardly arm23. The linking levers 22 are also fulcrumed about the transverse bar l6and are provided with individual springs 24 located between the fulcrumpoint and the point of connection to the interponent links 23 therebyinsuring that the levers will be pivoted about fulcrum |6 so as toretain the forward end of the levers 22 and the T-levers 2| connectedthereto in their normal or upward position. 7

One of the T-levers 2| functions as a universal bar which will bedepressed uponthe operation of any one of the key levers ll. Suchoperation is provided by the notching of the underside of each of thecode bars M in such a manner that the portion overlying the universalT-lever 2| will cause it to be depressed. The purpose of thisuniversalT-lever 2 I, which has a rearwardly extending lever 22 which is notconnected to a punch interponent link 23butinstead to a lever 26 whichcontrols the opening and closing of an electrical contact for operatinga solenoid, will be described later.

The present equipment is provided with twenty ofthe T-levers 2| eachhaving a rearwardly extending lever 22 connected thereto. However, aspreviously mentioned, only nineteen of theselevers are connected to thepunch interponent links 23, the twentieth lever being connected to lever26 which operates an electrical contact in the solenoid circuitsNineteen punch interponents 21 are provided which are connected to thelinks 23 by adjustable rods 28, The interponent levers 21 are arrangedin two rows the forward row consisting of t n levers which do not extendto such a height as the back row of nine levers. Adjacent interponents21 which have been selected and raised to a point adjacent the tapepunches 29 will be moved toward the right, as viewed in Fig.

2, resulting in the punches likewise being moved 7 tape but passesthrough the tape a short distance.

A comb 3B is also provided having slots therein through which thepunches pass. The punches '29 are formed at this point of a smallersection,

3 having shoulders on either side of the comb 36.

to each of the upper ends of the interponent levers 2.1 is a punch 29.Inasmuch as there are nineteen interponents provided there are likewisenineteenpunches, one individual to each interponent. It is to beunderstood, however, that the number of punches and interponents mayvary depending on the type of code being'perforated. The punches 29 arearranged in an upper and a lower tier, the lower tier cooperating withthe upper end of the punch interponents in the forward row composed often in number, and the 7 upper tier of punches cooperating with thesecond row of nine punch interponents which eX- tend above theinterponents in the forward row. A special intermediate set of punches30 is provided for perforating the tape feed perforations in the tape.

I In operation, the operator depresses a; key lever resulting in thedownward pivoting of the corresponding code bar l4. Depending on thenotches in the lower'edge of the code bar, cer-- tain of the T-levers 2|will be depressed which results in a corresponding depression orpivoting movement about the fulcrum l6 of the rearwardly extendinglevers 22 secured to the T-levers 2|. Thedownward movement of the levers22 which is a clockwise rotation thereof, as viewed in Fig. 2, resultsin certain of the punch interponents 21 being raised, through the links23 and the adjustable bars 28, so that their upper ends are adjacent toa corresponding punch 29.

. Referring to Fig. 1, a punch head 3| is provided whichis slidablypositioned between two guides 32. Upon the forward movement of the punchhead 3|, by apparatus tobe described later, the

As the comb is securely connected to the punch head 3| it will moveforwardly with the punch head and upon its return movement will engagethe rearward shoulder on the punches and cause the punches to bepositively withdrawn from the perforations "in the tape. The returnmovement of the punch head 3| is caused by means of the spring 31, whichis tensioned during the punching operation and tends to return to itsnormal position thereafter. V

The particular mechanism provided for causing.

the operation of the punch head 3|, resulting in the perforatingoperation, will now be described.

A solenoid 38 is provided which is in an electrical V circuit that isestablished upon the closing of a pair of electrical contacts lol andH32. These contacts are closed as aresult of the depression of theuniversal T-lever 2| by any of the keylevers, which causes a clockwisepivoting, as viewed in Fig. 2, of the lever 22 having the extended lever26 thereon and the closing of the electrical contact thereby. Referringto Figs. 1 and 6, the upper end of the armature 39 of the solenoid has abell crank lever 4| attached thereto, the o-pposite end of which has aslot'th erein to receive the pin end 42 of an operating lever 43 whichis pivoted at 44. The operating lever 43 is normally held in an extremecounterclockwise position, as

viewed in Fig. l, by means of aspring 46 adjustably connected to a lug41'extendingifrom'the operating lever. The operating lever 43 has anupwardly extending lug 48 made integral theremoved completely within thesolenoid 38, results with, through which is adjustably positioned'a setscrew 49.

Upon the energization of the solenoid 38 as a result of the closingof'the electrical contact the armature 39 will be drawn downwardly (Fig.6) resulting in a pivoting movement of the bell crank lever 4| and acorresponding forward movement of the pin 42 (Fig. 1). Such a movementof the pin 42 causes the operating lever 43 to'be moved in a clockwisedirection about'its ,pivot point/44, as viewed in Fig. 1, against thetension of its spring 46. .The forward movement of the operating' lever43 results in the lug 48 integral therewith likewise moving forwardly,and with the forward end of the set screw 49 coming in contact with theback of the operating punch head.3|.'- A

continued clockwise movement of the operating lever 43,, which occurs asthe armature. 39 is in the forward movement of the punch head 3| to apoint whereat the punch head causes the selected interponenets 21 toexert pressure upon the associated punches to perforate the desired code7 combination in the tape.

Inasmuch as the operators manipulation of the chosen key is onlymomentary, the universal T-lever 2| willalmost immediately b'e allowedto o1 theinterponent levers 2].

aaeonas;

return to-its normal position underth'e action. of

th spring 24: connected; tothe associated reara extending linkzfi tomove downwardly and break the-electrical.contact. The opening of theelectricah contact results. in the de-energization. of

the solenoid 38 thereby releasing: the armature- 3Q toamove upwardly andallowing bell. crank 4| to pivot toits normal position under the tensionofpspringi t6 acting on the operating lever. 43, causing it to pivot:in. a counterclockwise direction 'as viewed. in Fig; 1.. This latterreturn movement to. normal position is likewise aided by the spring 31-associated with. punch head 31, which. causes-a. rearward movement of:thepunch head;

. In the drawings thereisillustrated mechanism to iinpart a variablefeed to thetap'e'. However, inasmuch as this mechanism does. not; form apart: or the. present: invention, nor is it necessary for a. complete:understanding thereof, it is not being: described herein. A full.description of mechanism and. its operation may be had by reierringx to.the above-mentioned patent or bulletin...

-As:-previously mentioned, the punch intere ponents 211 are positionedadjacent to their corresponding punches 29 depending on the interponentselectively conditioned by the mechanical linkage. associated with thedepressed key lever H. In. prior machines; these. interponents will stayintheir upward position only for the length of time that the key lever His depressed and .will return. to their downward. position under thetension of thesprings: 24,.immediate1y upon releaseiof the. key lever.Likewise; upon depression of a selected. key lever H, the universalT-lever 2:]; will be moved. downwardly, resulting in an upward movementof the extended arm 26 and a closure of the electrical contact forestablishing the solenoid. circuit. Upon. such condition. occurring, thepunch head..3l will be moved forwardly, through a mechanical linkage,and pressure apied by'the set screw 49 causes the punches 29 toperforate the-tape. Because of this latter mechanical linkage. for.operating the punch head 31,. and the relatively slow energization ofthe solenoid 38, it sometimes happens that the punch interponents 21will not. be in their upward positionat the timethat the operating punchhead iii moves fiorwardthereby resulting in the corresponding punch notbeing operated and a blank code combination being perforated in thetape. Eur. this. reason, the apparatus embodied in the present.inventionhas been designed to assure the perforating of the correct codecombination by locking. the punch interponents in their upward orSBIECtEdlDOSifi-OH. until the punching operation isainsured.

Referring to. Fig. 3, it may be seen that each of the punch interponents21 is provided. with a sidewardly extendin lug at a point just abovetheir union with the adjustable rods 28. A pair pawls or latches 52 and53, having springs 54' which normally tend to bias pawl 52 in a counbescenin Fig; 5; eachof the nineteen punch interponents 21. are providedwithia. corresponds outwardly extending lug 51'. and an: adjacent pawlsuch.- as or. 53; In. the: normal. position of. the apparatus-that is,whencthe key levers are not: depressed, the. punch interponents H are.their downward position; andthev springs 54; pivot the associated pawls:52andi 53 so; that their in.-

' wardly extend-inglugs. 51. are in abutment with.

terclockwise direction and pawl 53 in a clockwise direction, as viewedin Fig. 3, are pivotally positioned inthe frame of the ap aratus on rods56. Aswillbe: noted, the pawls 52 and 53 are provided toward their upperends with an inwardly extending h1g5! which is. adjacent to and at thesame height asthe outwardly extending lug 5| The pawls 5:2 and .53areal'so each provided with. asidewardly extendlng arm: 58. and 55,.respectively. A51 may theadjacen-t end of the outwardly extendinglug 5tof. the punch interponents 21.

When. one of the; punch interponents; 2.1: has been moved to itsupwardor selected position as a resultef the depression of a key lever tlpthelug 5| will move upwardly and out of engage? ment with the ends of thelug, 51- ofthe. pawl 52 or 53,. thereby allowing. the tension ofthespring 54. associated. with each pawl. to pivot: the pawl and cause thetop. surface of. the inwardly ex.- tendin lug: 51 to take a positionimmediately under the outwardly extending lug. 5L. Thus", upon.areleaseof the interponent 21- any premature. tendency for its downward.movement. will .be prevented, inasmuchv as. the pawl prevent any.downward. movement of the interponent 21-; It may be seen. that all ofthe nineteen interponents may be. locked in. their selected positions toinsure their being in that; position. at. the time that. the punchhead.3i. advances, and. until such time as the; pawls will be caused to bepivoted in such a manner. that the lugs-5i are. free of, the lugs 51..

Two bails 6| and 6.2 are provided, eachof. which is rotatably mounted.on the. studs 63.. Thebail 6| extends transversely of and exerts controlover the ten. pawls which. are associated with. the ten interponentlevers. comprisingthe control for-the lower tier of punches 2.9.whereasbail 62 extends transversely of and controls: the ninepa-wlsswhich are associated with. the-nine punch interponents 21.associated with. the upper tier of. punches 2-9.. Itis. to. benoted thatthetransverse bail 6 l1 overliesthe outwardly extending arms 58 ofthe'pawls 52,. while the. bail 62 overlies the outwardly. extending arms59 of the pawls: 53.. The bail 62 has connected to its lowerendaconnecting link 54. which is mounted at its. opposite end. on. pivotstud 66. The bail 6 I is connected to a. connecting link 61. throughitsupwardly extending arm 68 and; has. its opposite. endalsopivoted at66. A lever 69. securely pivoted at H. extendsdownwardly from-the pivot.stud 66 to which its upper end is. alsopivoted. The.- lever 69 has. aspring 7-2. secured to itsdepending arm the: opposite end of the. springbeing; secured: to. a pin. t3 which extends from the frame of the;equipment. The lever :69: has an. arm '|4 extending toward theright,,as; seen in Fig 3, which has: its inner face in engagement. with.an eccentric 16.. The eccentric i8 is utilizedto -adjust the normalposition of lever- 69, andthus links (i l and 61 and bails ti and6-2iThespri'ng 1 2 tends-to rotate the lever 69 in a counterclockwisedirection, as seen inFig. 3, but" the previously mentioned" engagementbetween the arm M and the eccentric 1'5 acts asia limit for thiscounterclockwise motion.

In normal. position, the. bails, connecting links and arms are intheposition shown. in. Fig. 3 with the bails 6| andEZ being a distanceabove the outwardly extending arms 58 and 59; ot the pawls 52 and. 53and with the spring 12. biasing the lever 69 toits maximumcounterclockwise direction whereat the arm 14 engages. the. eccentric.16;. It is to be noted. that. the arm 68 is provided with'a flat edge 11just to the left of the pivot stud66, as seenin Fig. 3. t v,

-Referringto Fig. 6, a pin'19' extends downwardlyfrom the bell crank 4|,just below its pivot point. A lever 8|, Fig, 5, is pivotally mounted at82 on a bracket extending from the perforating machine and has a slot-83' in'one end thereof which cooperates with the pin 19. The oppositeend of the lever 8| is formed of a flat upstanding section 84' which hasa pair of set screws 86 and 81 secured therein. 'The utility of setscrew 86 will be explained hereinafter. The set screw 81: is positionedimmediately adjacent the fiat face 11 of the lever 69 which is attachedat pivot stud 66 to the links 61 and 64.

In a normal position, or when the solenoid 38 is not'energized, the pinI9assumes the position shown in Fig. 6, toward the left, due to thearmature 39 not being drawn within the solenoid and the bell crank 4|pivoting ina clockwise direction. This results in the lever 8| beingpivoted in a clockwise direction, as seen in Fig. 5, with theupstandingportion 84 and the set screw 8! being out of engagement withthe flat section 11 of the lever 69. When a key lever H is depressed,which as previously described causes a contact to close and energizesolenoid 38, the solenoid causes the armature 39 to be drawn inwardlyresulting in 'a' counterclockwise pivoting of the bell crank 4|, asviewed in Fig.6. This results in the operating lever- 43 being pivotedin a clockwise direction, Fig. 1, resulting in the operating head 3|engaging the upper ends of the punch interponents 21- and causing thepunches 29 to perforate the tape. crank lever 4| was pivoted'in acounterclockwise direction, Fig. 6, due to the energization of solenoid38, the pin 19 caused the lever 8| to be pivoted in a counterclockwisedirection, as viewed in Fig. 5, resulting in the set screw 81 cominginto engagement with the flat surface 11 of the lever 69 and thuspivoting the lever 69 in a clockwise direction, as viewed in Fig. 3. Aclockwise movement of the lever 69 causes the links 61 and 64 to bemoved toward the right, as viewed in Fig, 3. As previously mentioned,link 64 is pivotally connected to bail 62, and link 6! is pivotallyconnected to bail 6| by the arm 68. The rightward movement of the link64 results in the bail 62 being pivoted in a counterclockwise direction,as seen in Fig. 3, causing its transverse section to come in contactwith the upper surface of the outwardly extending arms 59 of the pawls'53. -At the same time, the rightward movement of the link 61, throughthe arm 68 causes the bail 6| to be' pivoted in a clockwise direction,Fig. 3, causing its transverse section to engage the upper surface ofthe outwardly extending arms 58 of the pawls 52. Thus, both the pawls 52and 53 will be caused to pivot about their pivots Y 56, against thetension of their respective springs At the'same time that the bell 54.Such a pivoting of the pawls results in their inwardly extending lugs 51being moved outwardly thus freeing the outwardly extending lugs 5| 1 ofthe punch interponents 21. Thus, at this time, the punch interponentsare'able to return to their normal or extreme downward position inreadiness for another key to be depressed.

Inasmuch as the bell crank lever 4| controls the operation of the punchhead 3| through the operating lever 43, and the operation of therelease, of the bails through the linkage and the lever 8| it is'necessary that the set screw 81 be positioned in such a manner that itwill not come in engagement with the flatsurface 11 of the lever. 69 andcause the lever69 through the links 64 and 61 to release the punchinterponents 21 by means of the pawls 52 and 53, until such time as theoperating head 3| has moved for-. wardly to an extent necessary to comein contact with th top end of the punch interponents 21 and cause thecode combination to be perforated in the tape. This is possible inasmuchas the punches do not stop immediately'upon contact with the tape, butinstead pass through it a short distance. In thismanner it is assuredthat thepunch' interponents will not be allowed to move downwardly asthey are positively ens gaged by the head 3| in the actual tapeperforating operation. When the punch head 3| is free to resume itsnormal or outward position due to the de-energization of solenoid38-.the punch interponents 21 are free to resume their normal ordownward position. i

. An operational view has been shown in Fig; 4 wherein the pawls areshown in solid lines in their looking or latching position beneath theoutwardly extending lugs of the punch interponents, and the pawls areshown in dotted lines in their position of release with respect to theoutwardly ex tending lugs of the punch interponents after the action oftheir respective bails. The corresponding two positions of the linksconnected to the bails, the lever 69 and the set screw 81, and theupwardly extending section 94 of the lever 8| have all been shown. It isto be remembered that the normal position is not in a latched but ratherin an unlatched position.

Fig. '7 discloses a device which is designed to insure that theelectrical contact associated with V the universal T-lever 2| will beheld inits closed position for a time sufficient to allow the solenoid38 to be completely energized. As disclosed in Fig. 6, the lever 26forming an extension of the rearwardly extending lever 22 associatedwith the universal T-lever 2| has a sidewardly extending ear 9| whichhas a set screw 92 adjustably positioned therein. A bar 93 is slidablymount-'- ed on the frame of the perforating machine by slots 94 in bar93 which travel on pins 95 extending from the frame. The bar 93 has asidewardly extending lug 96 which has a springf9l secured thereto. Theopposite end of the spring 91'is secured to a lug extending from theframe to which the bar 93 is slidably mounted, the spring normallytending to urge the bar"93 to its downward position. The bar 93is alsoprovided with an outwardly extending lug =98and an upwardly and inwardlyextending insulated lug 99; The utility of these latter two lugs will bementioned hereinafter. The electrical contact which has previously beenmentioned asbeing under the control of the universal T-lever'2l isformed of an upper spring contact member HH and a lower spring contactmember I02. During the normal or unoperated position of these springcontacts |6| and I92 their normal resilience urges them in a directionopposite to each other so that at this time the electrical contact is inits open position with no circuit established for the energization ofthe solenoid 38.

A three-armed lever is pivoted at I03 on a post extending from theupright frame work of the apparatus, having one arm extending downwardlywith a hook I96 at its lower extremity; A second arm 19! extendssidewardly, as seen'in Fig. 6, and has a spring I68 attached toward itsouter end, the spring tending to pivot the three-armed lever in aclockwise direction. A third arm I99 extends upwardly above thepivotpoint I93 and -rnus'tbe held in engagement with each other.

ano e-so has a mercur c lug 1 1| KFigJ- T) at the't'op "there;- of. Itis to be noted that the "hook 106 on "the Irm t'II is adiacen tto thesidewardly extending ii-i338 of the bar "93, and the circular topsection 1 of the arm Ills-is adjacent to the set sorew86, previouslymentioned, which is secured in theupwardly extending section 84 of lth'elever end of the spring I08, the other end :of which was secured to armll) of the first mentioned three-armed lever, secured to its outerextremity.

Athlrdarm II6 extends upwardly and is provided with a set screw I I1passing therethrough, which in its normal position 'is situatedimmediately to the'rear of the upturned section '84 of the lever 81.

When anyone of the individual key levers I I is depressed, the universalT-lever 2I is likewise depressed, as previously mentioned, resulting ina. pivoting movement of its rearwardly extending lever 22 having theextending link 26 connected thereto. As viewed in Fig. 6, this resultsin a colmterclockwise movement of the extending link 16. Anysuc'hmovementto this link is imparted to its 'si'd'ewardly extending portionSi, and the se'tscrew Mtherein is likewise moved in a counterclockwisedirection, resulting in the set screw 92 engaging the bottom of-'bar 93and urging it 'upwardly against the tension of the spring 91.

An'upward movement of the 'bar 93 causes the lower spring contact I'll-2to be moved upwardly, inasmuch as this contact spring is immediatelyabove the bar 93. Inasmuch as the lug 9B is a part ofthe bar 93, itwillalso move upwardly, thus allowing the arm IM of the three-armed leverpivoted at I03 to move in a clockwise direction nnderthe tension of thespring I03 thereby-causlng the hook I06 at the lower end of the arm I'Mtomove to a position underlying the'lug 98 which has just movedupwardly. During this upward movement the lower electrical contact N12has "been caused to engage the upper electrical contact 'IIH andinasmuch as the bar 93 moves to an extentslightlyhigher than thatnecessary for the hook I06 to underlie the lug 98. the two contacts amatter of fact, the top spring contact I'DI is positively kept; inengagement with the lower spring contact M2 by means of the arm N2 ofthe three-armed lever pivoted at III] which has, Was-previouslymentioned, a bulge in itslowersurface immediatel above the upper contactspring MI. The arm H2 is normally biased in a counterclockwisedirection, as viewed in Fig. 6, by the spring I08. During the slightamount of downward movement of the bar 93, after the universal T-lever2| and the rearwardly extending lever 22 and the connecting link 26 arereleased, to the point whereat the lug 98 will engage the'hook I I16andhold the bar 93 in an upward position, the two contacts are kept inengagement by means of "the'tension of the'spring I08 urging the arm II2 in a counterclockwise direction. Thus, by this device "it is insuredthat the electrical contacts will be positively closed and that by thelock-up arrangement they will be kept in engagement forimportantinasmuchas the establishment of the electrical circuit for :theenergization of solenoid 38 depends on this electrical contact.

It will be remembered, as previously described, that :upon theenergization :of solenoid 38 causing the armature 39tomove downwardly,as viewed in Fig. 6,--and -resulting in :a counterclockwise movement .ofhell icrarrkfiflfthat :the lever 81 will be pivoted inn counterclockwisedirection,xas viewed in Fig. "7. Upon the counterclockwise movement.ofthelever 81, theset'sorew .86 passing through its upwardly extendingsection 814 will engage the rounded .upperextremity 'Ill of the arm 109of the lthree-aarmed lever ipivoted' at I 03,. causing arm +09 to pivot.in acounterclockwise direction ,:(Fi' 6). :Sucha movement of the armI04 .results in the hook 31135 at its lower extremity movingoutwardlyrand freeingrthe sidewardly extending lug 98 of the ibar :93.vAt this "time, the barBB is free to :move ina downward direction undertension :ofits spring 911., inasmuch as the set screw slimme'diatelyunderlying the bar 193 has also been moved. :Upon the downward movementof the roar itsnpwardl and sidewardl extendinglug 99, which overlies theFlower spring contact I02,

ca'uses :contact to be-moved in :a downwarddirection.therebyiinsuringzan opening of theelectrical contacts.Atthersame time as the arm I'M pivots in .a mounterclockwise "direction,as viewed in :Fig. t6, the spring 1418 extending from arm 4111 will tendto exert a pressure on the arm H4 of the threearmed lever pivoted at II0 attempting to movethezarm IIZdn a counterclockwise direction, asviewedinsFZig. 6. .If :this were to} occur, the :arm 1 1.2 would lea-use:the spring contact IIlI to follow the other spring contact 1112downwardly, resulting in the contact :being .kept closed ratherthanopened. However, the stop I;I3 prevents zthe :arrm 1:12 .from..movin'gfurther than :a predetermined distance. I

After the electrical contacts have been opened the solenoidL-38isade-renergized :and the armature 3 9 n'e'l'easedithereby, irBSliTtingin the lbEll crank lever I I heingipivotcdin a clockwise direction, asviewed in Fig. 6. Such a movement of the bell icrank 1183181 4sI resultsin :a similar movement to the pin 19 connected thereto, Jresulting in,the lever 8:1 .being :pivoted .in a clockwise direction, as viewed :inFig. 7.. :As the lever 8| moves in this direction Sits :uptumed :section84 engages the set screw 113 which passes through the arm I I6 ofthe-three-armed lever :pivoted at :1 :I'll. Upon .further movement ofthe lever M the arm "I I 6 is urged in a counterclockwise direction, asviewed in '57., resulting .in the second arm I-I2 likewise movinginacounterclockwiseidirection and thereby releasing "pressure from theupper sp g contact Illl which it overlies. Inasmuch "as at this timenopressureis beingapplied to either theupper spring rcontact 2I10.I orthe :lower spring contact 2102 they will he allowed to respond to theirinherent resilience which results in their being.urgedzinopposite-directions, therebyinsuring that the electrical:contact will remain open.

' What is claimed is:

1. In combination inaperforatingmachine, a

pluralityof punches, a plurality of punch controllers, oneindividualztoeach ofsaid punches, a keyboard selector mechanism forselectively setting said controllers in various combinations, means formoving said selected controllers to cause said'punches to perforate atape, a separate spring urged pawl individual to each of saidcontrollers, a lug extending from each. .of said controllers wherebywhen such controllers are in their selected positions said spring urgedpawl will assume a position beneath said lug to block said controller inits selected position, and means to release said spring urged pawls fromblocking engagement with said lug to allow said controllers to assumetheir unselected position.

2. In a perforating machine, a key actuated selector, a plurality ofpunches, a plurality of punch interponents, one individual to each ofvsaid punches, said interponents selectively conditioned by said selectorin various combinations, a 'return spring for each of said interponents,means for moving said conditioned punch interponents to cause saidpunches to perforate a tape,'separate means to directly latch saidinterponents in their conditionedposition, and means under the controlof said punch interponent moving means to restore said latching meanswhereby said punch interponents may be returned by their said springs:to their nonconditioned positions.

3. In a keyboard perforator, a plurality of punches, a plurality ofinterponents, one individual to each of said punches, key lever meansfor selectively conditioning said interponents in various combinations,means for moving said conditioned interponents to cause said punches toperforate a tape, separate latch means cooperable directly with each ofsaid interponents for holding said interponents in their said selectedpositions after said key lever means are released, and means under thecontrol of said means for moving said interponents for releasingsaidinterponents from their said selected positions.

4. In a keyboard perforator, a plurality of punches, a plurality ofinterponents, one individual to each of said punches, key lever meansfor selectively conditioning said interponents, a punch hammer formoving said conditioned interponents to cause said punches to perforatea tape, latch means cooperable directly with each I of said interponentsfor holding said interponents in their selected positions after said keylever means are released, and release means including apair of bails forrestoring said latch means whereby said interponents are free to resumetheir nonselected positions.

5. In a keyboard perforator, a plurality of punches, a plurality ofinterponents, one individual to each of said punches, key lever meansfor selectively conditioning said interponents in various combinations,a solenoid energized upon the operation of said key lever means,- apunch hammer under the control of said solenoid for moving saidconditioned interponents to cause said punches to perforate a tape uponthe energization of said solenoid, separate latch means cooperabledirectly with each of said interponents for holding said interponents intheir selected positions after. said key lever means are released, andmeans under the control of said solenoid for releasing said latch meanswhereby said interponents are released from their-said selectedpositions. T :f,

6. In combination in a perforating machine,-a plurality of punches, aplurality of punch interponents, one individualto each ofsaid punches, akeyboard selector mechanism for selectively setting said interponents invarious combinations, means for moving said selected interpo nents tocause said punches to perforate a tape,

separate blocking means individual to each of said interponents, a lugextending from eachof a keyboard selector mechanism for selectively 7setting said interponents in various-combina tions, means for movingsaid selected interponents to cause said punches to perforate a tape,

a separate spring urged pawl individual to each' of said interponents, alug extending from each of-said interponents whereby when saidinterponents are in their selected position said spring urged pawls willassume a position beneath said lugs to block said interponents in theirselected position, and means under the controlof said means for movingsaid selected interponents to release said spring urged'pawls from theirblocking engagement with said lugs to allowsaid inter,- ponents toassume their unselected positions.

8. In combination in a perforating machine, a plurality of punches, aplurality of punch controllers, one individual to each of said punches,a keyboard selector mechanismfor selectively setting said controllers invarious combinations, means for moving said selected-controllers tocause said punches to perforate a tape, separate blocking meansindividual to each of said-controllers, means forming a part of saidcontrollers whereby when said controllers are in their selected positionsaid blocking'means will engage said means forming a part of saidcontrollers to block said controllers in their selected positions andmeans to release said blocking means from its blocking engagement withsaid means forming a part of said controllers to allow said controllersto assume their unselected positions.

9. In combination in a perforating machine, a plurality of punches, aplurality of punch controllers, one individual to each of said punches,

a keyboard selector mechanism for selectively setting said controllers,means for moving said selected cpntrollers to cause said punches toperforate a tape, a spring urged pawl individual to each of' saidcontrollers, a lug extending from each of said controllers whereby whensaid'controllers are in their selected'positions said spring urged pawlswill assume a position beneath said lugs to block said controllers intheir selected positions, and means including a pair of bails under thecontrol of said means for moving said selected controllers to releasesaid spring urged pawls from their blocking engagement with-said lugs toallow said controllers to assume their-unselected positions.

ERWIN A: GUBISCH.

